Phylum：Chytridiomycota　>>　Class： Chytridiomycetes　>>　 Order： Chytridiales 
   
 
　BCRC Number： NO BCRC Number!  
   
　Scientific Name： Rhizophydium sphaerocarpum var. sphaerocarpum
 
   
   
　Author：

Rhizophydium sphaerocarpum var. sphaerocarpum (Zopf) Rabenhorst. Kryptogamen-Fl.1(4):95. 1892.
   
 
 
 
 
　Description： On pine pollen: Zoosporangium epibiotic or interbiotic, spherical, 7.5-47.5 μm diam. Rhizoids arising from a delicate main axis, on sporangium base. Zoospores ooze through a wide apical pore in a loose mass, empty sporangium urceolate with one apical pore. Resting spores spherical, 12.5-17.5 μm diam., with a large centric globule, smooth wall.In 1/4 YpSs slush: Zoosporangium spherical, 22-27 μm diam., with a large apical or subapical exit pore, 9.9-12.4 μm diam., occasionally a very fine operculum-like structure was seen.Rhizoids from one fine axis, which is 19.7-54.3 μm long; extensive branching from distal end of rhizoidal axis.On 1/4 YpSs agar: Young sporangium with several oil globules, one thread-like main axis extending from sporangium base, sparingly branched. Zoospores globular, 4-5 μm diam., emerging through the apical portion of wall, becoming amoeboid, then swimming away. Empty sporangium urceolate. Color of colony buff to off-white.
 
 
 
 
 
　Specimens：

Taiwan. Taipei: Yangmingshan Tatun Natural Park, water, 8 Apr 1991,Hsu 01; Pinghsi, water from stream, 16 Jul 1992, NTNU 101a; Nantou: Puli, waterfall, 20 July 1992, NTNU 201b; Chiayi: Alishan, spring water, 4 Aug 1992, NTNU 301a; Ilan: Harpen, lake water, 27 Mar 1993, NTNU 809a; Taichung: Tungshih woodland, lake water, 6 Sep 1994,NTNU 2301a; Hueysuen woodland, stream water, 21 Dec 1997, CSF 3302a. Isolated on pinepollen from all water samples.
 
 
 
　Habitat： Fresh water.
 
 
 
　Distribution：

Germany, USA, Manchuria, Japan, Hungary, Latvia, Equatorial East Africa,South Africa, Sweden, Taiwan.
 
 
 
　References：

Barr, DJS. 1970; Chen, SF et al. 2000.
   
   
   
　Provided：

S. F. Chen
 
 
　Note： Ubiquitous. An urceolate empty sporangium and delicate slender rhizoids are the main characters. Physiological tests on our isolate indicate that the maximum temperature for growth is nearly 30 °C. According to color of colony, this isolate is identified R. sphaerocarpum var. sphaerocarpum. The above is similar to Barr‘s (1970) report.